CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 23,706	$ 36,559
Prepaid expenses and other current assets	4,209	4,383
Total current assets	27,915	40,942
Property and equipment, net	37	64
Right-of-use lease asset	153	30
Non-current deposits	2,916	1,551
Total assets	31,021	42,587
Current liabilities:
Accounts payable	983	2,117
Accrued and other current liabilities	3,370	3,177
Total current liabilities	4,353	5,294
Lease liability	107	30
Total liabilities	4,460	5,324
Redeemable common stock, $0.001 par value, 0 and 3,117,100 shares issued and outstanding at December 31, 2021 and September 30, 2022 (Note 10)	4,494	0
Stockholders' equity:
Common stock, $0.001 par value; 100,000,000 shares authorized at December 31, 2021 and September 30, 2022; 9,993,135 shares and 12,539,189 shares issued and outstanding at December 31, 2021 and September 30, 2022, respectively.	9	10
Additional paid-in capital	422,542	422,960
Accumulated other comprehensive loss	(1,746)	(748)
Accumulated deficit	(398,738)	(384,959)
Total stockholders' equity	22,067	37,263
Total liabilities and stockholders' equity	31,021	42,587
6% convertible exchangeable preferred stock
Stockholders' equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized at December 31, 2021 and September 30, 2022;	0	0
Series A Convertible Preferred Stock
Stockholders' equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized at December 31, 2021 and September 30, 2022;	0	0
Series B Convertible Preferred Stock
Stockholders' equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized at December 31, 2021 and September 30, 2022;	$ 0	$ 0

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).